Thread: 4tec jet pump cone grease
03-22-2007, 02:52 PM #1
- Join Date
- Feb 2007
4tec jet pump cone grease
I've just replaced my jetpump, and kinda surrounded the bearing and semi-filled the cone with grease.
I am having trouble understanding the purpose of filling the cone with grease since I doubt that 1 bit of it will reach the bearings themselves. Rather any excess grease will spin-off into the cone.
Does anyone have an answer for this? Does heat actually draw some of the grease in?
On the 2 strokes we've filled the cone with synthetic oil, which obviously could flow throughout the moving parts.
Last edited by njseadooer; 03-22-2007 at 02:56 PM.
03-22-2007, 03:15 PM #2
03-22-2007, 03:23 PM #3
yes it is a very poor design. Like Redevil said many people buy an aluminum tail cone from skat trak and fill it with synthetic gear lube. I think its possible to use the stock cone and fill it with gear lube but it will be messier to change. you would have to change the gear lube out every 15 hours of use.
03-22-2007, 03:28 PM #4
03-22-2007, 03:29 PM #5
Or you could take the pump off and tip the original plastic cone down and pull it off that way.........then drain it and refill with gear oil........
03-22-2007, 03:33 PM #6
03-22-2007, 03:36 PM #7
03-22-2007, 04:51 PM #8
why not just drill and tap the stock cone and put a NPT plug in it?
03-22-2007, 05:12 PM #9
03-22-2007, 05:46 PM #10
What we have been doing in Yami-land for a few years now, is working out quite nice. I first heard about it from Fercho.
Mix 50/50 synthetic gear oil, and synthetic marine grease, into a thick runny paste. It will stay thick enough not to pass the seals yet gets into the bearings themselves.
I haven't tried it on the SD pump, but I can't see why it would be any different.
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